3. Precision Conveyor Chains
i) Accurate positioning in a high-speed or indexing drive. For example, in an application of automatic installation of electronic parts with 30 stations, a conveying speed of 10 m/min., and an index of 0.6 sec- onds, the positioning accuracy is ± 0.2 mm (using a positioning pin).
Standard Type and High-Precision Type
Number of Cycles
Figure 3.5 After Installation, Precision Chain Has No Elongation
ii) No annoying position-adjustment maintenance. iii) No take-up adjustment or lubrication.
(2) The main dimensions are the same as double pitch roller chain and large pitch conveyor chain (R-rollers). That gives you the following benefits: i) Change from standard chains to Bearing Bush Chains with minimal redesign of the equipment. ii) Low-cost standard sprockets can be used (special made-to-order sprockets are required for high accuracy). iii) Available with a variety of attachments. (3) Relatively low cost. Bearing Bush Chain has many sizes from small to large (Table 3.1). Sprockets For double pitch roller chain type, standard sprockets are used for general applications. When the application requires high accuracy, special-order sprockets are needed. For Engineering Class conveyor chains, machined-tooth sprockets (made to order) are used instead of standard flame-cut sprockets.
Table 3.1 Precision Conveyor Chain
Double Pitch Chain
Maximum Engineering Class Chain
Maximum Allowable Load (kN)
Allowable Load (kN)
Chain No. RFN2040R RFN2050R RFN2060R RFN2080R
Chain No. RFN03075R RFN05100R RFN10150R RFN12200R RFN17200R RFN26250R RFN36300R
0.78 1.27 1.76 2.94
2.45 4.90 7.85 9.81
12.70 19.60 24.50
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